I like that it was easy for me as an individual user who wants usability improvements in my product or business service with minimum hassle of coding myself! It has been amazing experience using CXO UI so far though i have not used any other tools before this (except some JS frameworks).
Nothing at all really - since everything is there already integrated within one package which makes life easier rather than having separate apps installed everywhere where you need them!! Well worth trying out if your looking forward solving problems related around User Experience Optimisation from endpoints perspective without touching code itself!